Made "opencase_cases" and "opencase_no_cases" modules and gave the latter a version of the contextual menu

modules/opencase_no_cases/config/install/block.block.opencasecontextualmenu.yml

@@ -0,0 +1,19 @@
+langcode: en
+status: true
+dependencies:
+  module:
+    - opencase_no_cases
+  theme:
+    - bartik
+id: opencasecontextualmenu
+theme: bartik
+region: sidebar_second
+weight: -6
+provider: null
+plugin: opencase_no_cases_contextual_menu
+settings:
+  id: opencase_no_cases_contextual_menu
+  label: 'OpenCase Contextual Menu'
+  provider: opencase_no_cases
+  label_display: '0'
+visibility: {  }